Wear characteristics of TiNi shape memory alloys
Journal
Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Journal Volume
28
Journal Issue
9
Pages
1871-1877
Date Issued
1997
Author(s)
Abstract
The wear characteristics of TiNi shape memory alloys against Cr-steel have been studied. Experimental results indicate that the-Ti49Ni51 alloy can exhibit a better wear resistance than Ti50Ni50 alloy due to their higher hardness and pseudoelastic behaviors. Four main mechanisms, adhesion, abrasion, surface fatigue, and brinelling, are found to have-important contributions to the wear characteristics of TiNi alloys. The weight loss increases with increasing wear load and sliding distance but decreases with increasing sliding speed. The contact area during sliding wear will be increased due to the variant accommodation and/or pseudoelasticity and, hence, will reduce the average compressive stress and wear damage. Variant accommodation and/or pseudoelasticity can also stabilize the crack tips and hinder crack propagation, hence improving the wear characteristics of TiNi alloys.
SDGs
Type
journal article